234 
LINES OF MAGNETIC DECLINATION IN THE ATLANTIC. 
Table XII. (Continued.) 
Lat. 
Long. 
Date. 
Observer. 
Observed 
Declina- 
tion. 
Correc- 
tion for 
Epoch. 
Corrected 
Declina- 
tion. 
Remarks. 
Between the latitudes of — 60' 
and —70° (continued). 
-70 50 
343 34 
Mar. 1843. Ross. 
o / 
3 03 
o / 
— 0 23 
2 40 
At seaf. 
-62 18 
343 44 
Feb. 1843. 
Crozier. 
3 01 
— 0 25 
2 36 
At seaf. 
— 62 24 
343 58 
Feb. 1843. 
Crozier. 
5 00 
— 0 25 
4 35 
At seaf. 
— 62 52 
344 33 
Feb. 1843. 
Ross. 
4 49 
— 0 25 
4 24 
At seaf. 
-64 48 
345 16 
Feb. 1843. 
Ross. 
5 11 
— 0 25 
4 46 
At seaf. 
-69 42 
345 20 
Mar. 1843. 
Crozier. 
1 35 
— 0 23 
1 12 
At sea*)*. 
-69 13 
345 55 
Mar. 1843. 
Ross. 
3 25 
— 0 23 
3 02 
At seaf. 
—64 29 
346 02 
Mar. 1843. 
Ross. 
4 19 
— 0 25 
3 54 
At seaf. 
— 64 06 
346 15 
Mar. 1843. 
Crozier. 
5 15 
— 0 25 
4 50 
At seaf. 
—64 14 
346 15 
Feb. 1843. 
Crozier. 
5 01 
-0 25 
4 36 
At seaf. 
-66 10 
346 40 
Mar. 1843. 
Crozier. 
5 25 
— 0 25 
5 00 
At seaf. 
-68 30 
346 50 
Mar. 1843. 
Crozier. 
3 51 
— 0 25 
3 26 
At seaf. 
—68 10 
347 45 
Mar. 1 843. 
Crozier. 
5 18 
-0 25 
4 53 
At seaf. 
— 68 08 
348 10 
Mar. 1 843. 
Crozier. 
3 48 
— 0 25 
3 23 
At seaf. 
-61 16 
348 56 
Mar. 1843. 
Ross. 
8 49 
- 0 25 
8 24 
At seaf. 
-61 16 
349 00 
Mar. 1843. 
Crozier. 
7 07 
— 0 25 
6 42 
At seaf. 
-65 01 
349 04 
Feb. 1843. 
Crozier. 
6 34 
— 0 25 
6 09 
At seaf. 
—65 08 
349 50 
Feb. 1843. 
Ross. 
7 35 
— 0 25 
7 10 
At seaf. 
-67 12 
350 36 
Mar. 1843. 
Crozier. 
6 43 
— 0 25 
6 18 
At seaf. 
— 66 00 
351 00 
Mar. 1843. 
Crozier. 
8 47 
— 0 25 
8 22 
At seaf. 
— 66 40 
351 39 
Mar. 1843. 
Ross. 
8 54 
— 0 25 
8 29 
At seaf. 
—61 12 
9 30 
Feb. 1845. 
Moore and Clerk. 
20 29 
-0 40 
19 49 
At seaf. 
—62 03 
12 45 
Feb. 1845. 
Moore and Clerk. 
22 07 
— 0 40 
21 27 
At seaf. 
— 6l 54 
16 40 
Feb. 1845. 
Moore and Clerk. 
23 11 
— 0 40 
22 31 
At seaf. 
-6l 49 
19 13 
Feb. 1845. 
Moore and Clerk. 
26 16 
— 0 40 
25 36 
At seaf. 
-62 05 
20 58 
Feb. 1845. 
Moore and Clerk. 
28 05 
-0 40 
27 25 
At seaf. 
CONTENTS. 
Introduction 173 
Observations employed; — 
A. Sea Observations, uncorrected for the Ship’s Magnetism 1/5 
B. Sea Observations, corrected for the Ship’s Magnetism 176 
C. Land Observations, on Coasts and Islands 176 
Discussion of the Corrections for the Ship’s Magnetism 177 
Arrangement of the Observations in Groups 195 
Table of the Declination in 1840 at the intersection of every 5° of Latitude and Longitude 202 
Table of Secular Change 26^ 
Comjiarison with M. Gauss’s General Theory 204 
General Table of the observations employed in the Map arranged according to Latitude and Longitude... 20/ 
